Average Corneal Staining Area [ Time Frame: After 2 hours of wear ] [ Designated as safety issue: No ]

Percentage corneal staining was assessed by the investigator for each of five regions of the cornea, i.e., four quadrants plus central. The investigator instilled fluorescein dye and examined the cornea with a slit lamp, i.e., biomicroscope and a yellow filter. Percentage corneal staining area was recorded in increments of ten, and the percentages of the five regions were averaged together.

Total Corneal Staining Type [ Time Frame: After 2 hours of wear ] [ Designated as safety issue: No ]

Total corneal staining type was assessed by the investigator for each of 5 regions of the cornea, i.e., four quadrants plus central. The investigator instilled fluorescein dye and examined the cornea with a slit lamp, i.e., biomicroscope and a yellow filter. Corneal staining type was recorded on a 5-point scale for each region: 0-none; 1-micropunctate; 2-macropunctate; 3-coalesced macropunctate; 4-patch (>/= 1mm). The five regions were summed.

Ocular comfort was recorded by the participant on a questionnaire using a 5-point scale. Participant completed the sentence, "Right now my eyes feel..." with one of the following responses: 1-very comfortable; 2-comfortable; 3-neither comfortable nor uncomfortable; 4-uncomfortable; 5-very uncomfortable.

Ocular Redness [ Time Frame: After two hours of wear ] [ Designated as safety issue: No ]

Ocular redness was recorded by the participant on a questionnaire using a 5-point scale. Participant completed the sentence, "Right now my eyes look..." with one of the following responses: 1-very white; 2-white; 3-neither white nor red; 4-red; 5-very red.

Nelfilcon A contact lenses inserted after being soaked overnight in a multi-purpose disinfecting solution, followed by nelfilcon A contact lenses inserted directly from the blister package. Each pair of lenses worn for 2 hours.

Nelfilcon A contact lenses inserted directly from the blister package, followed by nelfilcon A contact lenses inserted after being soaked overnight in a multi-purpose disinfecting solution. Each pair of lenses worn for 2 hours.

Etafilcon A contact lenses inserted after being soaked overnight in a multi-purpose disinfecting solution, followed by etafilcon A contact lenses inserted directly from the blister package. Each pair of lenses worn for 2 hours.

Etafilcon A contact lenses inserted directly from the blister package, followed by etafilcon A contact lenses inserted after being soaked overnight in a multi-purpose disinfecting solution. Each pair of lenses worn for 2 hours.

Corneal staining and subjective responses for ocular redness and comfort will be compared.

Eligibility

Ages Eligible for Study:

18 Years and older (Adult, Senior)

Genders Eligible for Study:

Both

Accepts Healthy Volunteers:

No

Criteria

Inclusion Criteria:

18 years of age or older.

Visual acuity correctable to 20/30 (Snellen) or better in each eye at distance with contact lenses.

Successfully wearing hydrogel or silicone hydrogel contact lenses on a daily wear basis for at least two weeks prior to study.

Other protocol-defined inclusion criteria may apply.

Exclusion Criteria:

History of hypersensitivity to any components of the multi-purpose solution.

Evidence or history of ocular conditions as prescribed in protocol.

One functional eye or a monofit lens

Any slit-lamp finding score equal to 1 at Visit 1 of each study period.

Significant corneal staining at visit 1 of each study period as prescribed in protocol.

Other protocol-defined exclusion criteria may apply.

Contacts and Locations

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study.
To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.
For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00733291